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MQ-Fabric Client Example :: Simple Consumer

This project shows how to connect to JBoss A-MQ message brokers running in Fuse Fabric from a pure JMS client running outside of Fuse Fabric (i.e. when the JMS client is not running within a Fabric-enabled JBoss Fuse ESB container).

Building the example

To build the example, execute the command:

> mvn clean install

Running the example

Assumes you have setup a fabric-based network of brokers per the instructions in fabric-ha-setup-master-slave.md.

Run this command:

> mvn exec:java

To figure out which container is currently the master from the command line is to inspect the logs:

cat instances/AMQ-East1/data/log/karaf.log | grep mq-fabric

After the example is up and running and you see JMS messages being logged to the consumer's console, kill the master broker on the west. You can use the cluster-list command in the karaf to find out which container is currently the master. For example:

JBossA-MQ:karaf@root> cluster-list
[cluster]                      [masters]                      [slaves]                       [services]
   amq-east-profile           AMQ-East2                     AMQ-East1                     tcp://chirino-retina.chirino:62184
   amq-west-profile           AMQ-West2                     AMQ-West1                     tcp://chirino-retina.chirino:62215

You can stop the master west container using FMC, or kill the container's process in the OS) and watch the consumer failover, reconnect and resume consuming messages, with console output like this:

Got 23. message: 23. message sent
Got 24. message: 24. message sent
Got 25. message: 25. message sent
WARN  Transport (tcp:// failed, reason:  java.io.EOFException, attempting to automatically reconnect
Adding new broker connection URL: tcp://mbrooks1.local:51805
Successfully reconnected to tcp://mbrooks1.local:51805
Got 26. message: 26. message sent
Got 27. message: 27. message sent